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AssigneeKabushiki Kaisha Toshiba
InventorsTatsuya Ishigaki, Takuya Uehara, Yoshio Hamamoto, Osamu Yamaguchi, Takeshi Maehara, Hiromi Kato
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An underwater welding apparatus includes: an underwater welding head provided underwater and having, at its leading end, a nozzle section from which laser light is emitted; a shied cover formed of an elastic member and provided around the nozzle section so as to form, at the leading end of the underwater welding head, a space where water is excluded by shield gas; and an expansion/contraction member having a discharge hole for discharging water and shield gas containing metal dust particles from an inside of the shield cover, the discharge hole being increased in diameter as pressure inside the shield cover rises, while being reduced in diameter as the pressure inside the shield cover falls.
An underwater welding apparatus comprising:
An underwater welding method that provides an underwater welding head underwater and performs underwater welding of a part to be welded of a structure, the method comprising steps of:
Dependencies are inferred from the claim text.